A novel information processor that can be easily operated is provided. In addition, a novel information processor that is less likely to be operated incorrectly is provided. The conceived information processor includes an arithmetic device including an arithmetic unit and a storage unit that stores a program to be executed by the arithmetic unit and an input/output device including an input unit that can supply an operation instruction and a bend sensor that can supply bend data. The program makes the arithmetic device execute different types of processing in accordance with the combination of the supplied operation instruction and bend data.